Laboratory Evaluation & Specification Development for Geogrids for Highway Engineering Applications

This report incorporates findings from research that was performed to evaluate the current specifications of geogrids for use in highway applications, with special emphasis on pavement applications. This project includes a thorough literature review synthesizing uses, specifications, and test methods for geogrid applications to highway construction. Index tests, performance benchmark testing, and accelerated pavement testing using a Mobile Model Load Simulator (MMLS), 1/3 scale, were conducted. The materials tested included seven geogrid products selected by the Pennsylvania Department of Transportation (PennDOT) for index testing: four of the eleven products were also subjected to bench and accelerated performance testing. Standard 2A aggregate and a typical Pennsylvania soil (A-2-4) were used for all tests requiring these materials. A correlation between critical geogrid parameters based on index tests and performance tests is presented. Important geogrid attributes that can influence reinforcing effectiveness were recognized. A geogrid material specification for the most common highway applications, i.e. flexible pavement subgrade reinforcement, embankment reinforcement, and slope reinforcement, was developed.

• Corporate Authors:

  Pennsylvania State University, University Park

  Pennsylvania Transportation Institute, Transportation Research Building
  University Park, PA  United States  16802

  Pennsylvania Department of Transportation

  Bureau of Planning and Research
  400 North Street, 6th Floor
  Harrisburg, PA  United States  17120-0064

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Chehab, Ghassan R
  • Palomino, Angelica
  • Tang, Xiaochao
• Publication Date: 2007-6-12

Language

• English

Media Info

• Media Type: Print
• Edition: Final Report
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 135p

Subject/Index Terms

• TRT Terms: Accelerated tests; Embankments; Flexible pavements; Geogrids; Geosynthetics; Material reinforcement; Pavement design; Pavement performance; Pavements; Slope stability; Specifications; Subgrade (Pavements)
• Uncontrolled Terms: Accelerated pavement tests; Model mobile load simulators
• Subject Areas: Design; Geotechnology; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 01056021
• Record Type: Publication
• Report/Paper Numbers: FHWA-PA-2007-009-050110, PTI 2007-58
• Contract Numbers: 050110
• Files: TRIS, USDOT, STATEDOT
• Created Date: Aug 30 2007 1:53PM